What is TCP IP Protocol?


A suite of protocols


  • Rules that dictate how packets of information are sent across multiple networks
  • Addressing
  • Error checking


  • Determines where packets are routed based on their destination addresses
  • Breaks packets into smaller packets and reassembles them.




The Process / Application layer protocols

  1. Telnet – Terminal Emulation
  • allows a user on a remote client machine called the Telnet client, to access the resources of another machine, the Telnet Server [ virtual terminal ]

[Port no. 23]

  1. File Transfer Protocol
  • FTP is a program operating as protocol
  • Used for file transfer between two systems
  • Can access both directories and files and can accomplish certain types of directory operations.
  • FTP uses Telnet to transparently log on to FTP server.
  • Uses authentication secured with user names and passwords.

** Directory Manipulation

  • Typing file contents
  • Copying file between hosts
  • It can’t execute remote files as programs. [ port no. 21]
  1. TFTP – Trivial File Transfer Protocol
  • Stock version of FTP
  • Fast
  • No directory-browsing abilities
  • Sends or receive much smaller blocks of data than FTP
  • No authentication, so its insecure [port no. 69]
  1. NFS – Network File System
  • protocol specializing in file sharing
  • allows two different types of file system to interoperate port no
  1. SMTP – Simple Mail Transfer Protocol
  • Used to send mail or e-mail
  • POP 3 used to receive mail [ port no. 110]
  • Port no. 25
  1. LPD – Line Printer Daemon
  • designed for printer sharing
  • LPD along with LPR [ Link Printer Program]
  • Allows print jobs to be spooled and sent to network printers using TCP/IP
  • Port no.
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